<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <button @click="obj.name = 'rose'">修改obj</button>
        <p>{{ obj }}</p>
    </div>
    <script src="./vue.js"></script>
    <script>
        new Vue({
            el: "#app",
            data() {
                return {
                    obj: {
                        name: 'jack',
                        age: 16
                    }
                }
            },
            watch: {
                obj: {
                    deep: true,
                    handler () {
                        console.log('对象任何属性改变都会触发')
                    },
                    // 页面初始化时立即调用一次handler回调函数
                    immediate: true
                }
            }
        })
    </script>
</body>
</html>